Impact of fracturing liquid absorption on the production and water-block unlocking for shale gas reservoir
Abstract view|610|times PDF download|199|times
Abstract
A large amount of liquid is pumped into the shale gas reservoir during hydraulic fracturing, and the fluid flowback ratio is usually low. However, field experience showed that the liquids did not cause severe damage to shale gas reservoir. It is urgent to clarify the water block unlocking mechanism of a shale gas reservoir. This work is to discuss the water block unlocking mechanism in shale gas reservoir. Based on the characteristic study of shale gas formation, the fracturing fluid absorption mechanism, absorption ability and impact on shale gas formation damage are systematically studied. Study shows that ultra-low water saturation, abundant micro- to nano- tubulars and a huge contact area are the control factors for strong fluid absorption ability of gas-shale. The strong water absorption capacity of the shale gas formation matrix is a key factor in removing water block. Organic matter also has an important influence on absorption ability and gas production. A conceptual evaluation criterion for water block unlocking is proposed based on core absorption capacity, original water saturation and fracture density. The shut-in after hydraulic fracturing is beneficial to gas production and can reduce water production for certain shale gas reservoir.
Cited as: Shen, Y., Ge, H., Zhang, X., Chang, L., Liu, D., Liu, J. Impact of fracturing liquid absorption on the production and water-block unlocking for shale gas reservoir. Advances in Geo-Energy Research, 2018, 2(2): 163-172, doi: 10.26804/ager.2018.02.05
Keywords
Full Text:
PDFReferences
Bennion, D.B., Thomas, F.B., Bietz, R.F., et al. Remediation of water and hydrocarbon phase trapping problems in low permeability gas reservoirs. J. Can. Pet. Technol. 1999, 38(8): 39-48.
Bennion, D.B., Thomas, F.B. Formation damage issues impacting the productivity of low permeability, low initial water saturation gas producing formations. J. Energy Resour. Technol. 2005, 127(3): 240-247.
Busch, A., Bertier, P., Gensterblum, Y., et al. On sorption and swelling of CO2 in clays. Geomech. Geophys. Geo-Energy Geo-Resour. 2016, 2(2): 111-130.
Cai, J., Hu, X., Xiao, B., et al. Recent developments on fractal-based approaches to nanofluids and nanoparticle aggregation. Int. J. Heat Mass Transf. 2017a, 105: 623-637.
Cai, J., Wei, W., Hu, X., et al. Electrical conductivity models in saturated porous media: A review. Earth-Sci. Rev. 2017b, 171: 419-433.
Cai, J., Yu, B., Zou, M., et al. Fractal characterization of spontaneous co-current imbibition in porous media. Energy Fuels 2010, 24(3): 1860-1867.
Cai, J., Yu, B. A discussion of the effect of tortuosity on the capillary imbibition in porous media. Transp. Porous Media 2011, 89(2): 251-263.
Civan, F.A. Multi-purpose formation damage model. Paper Presented at SPE formation damage control symposium, lafayette, louisiana, 14-15 February, 1996.
Civan, F. Reservoir Formation Damage. London, UK, Gulf Professional Publishing, 2011.
Dehghanpour, H., Zubair, H., Chhabra, A., et al. Liquid intake of organic shales. Energy Fuels 2012, 26(9): 5750-5758.
Ding, M., Kantzas, A. Capillary number correlations for gas-liquid systems. J. Can. Pet. Technol. 2007, 46(2): 27-32.
Dong, D., Wang, Y., Li, X., et al. Breakthrough and prospect of shale gas exploration and development in China. Natural Gas Industry 2016, 3(1): 12-26. (in Chinese)
Erwin, M.D., Pierson, C.R., Bennion, D.B. Brine imbibition damage in the Colville river field, Alaska. SPE Prod. Facil. 2005, 20(1): 26-34.
Fang, C., Huang, Z., Wang, Q., et al. Cause and significance of the ultra-low water saturation in gas-enriched shale reservoir. Nat. Gas Geosci. 2014, 25(3): 471-476.
Geng, J., Yan, J., Deng, T., et al. Characteristics of formation damage and protection drilling fluids for condensate gas reservoirs with low-permeability. Acta Petrologica Sinica 2011, 32(5): 893-899. (in Chinese)
Gupta, D.V. Unconventional fracturing fluids for tight gas reservoirs. Paper Presented at SPE hydraulic hracturing technology conference, Texas, 19-21 January, 2009.
Haikuan, N., Nie, H., Zhang, J., et al. Shale gas accumulation conditions of the Upper Ordovician-Lower Silurian in Sichuan Basin and its periphery. Oil & Gas Geology 2012, 33(3): 336-345. (in Chinese)
He, C., Hua, M. Reservoir damage by fracturing fluid and its prevention. Driuing Fluid and Completion Fluld 2003, 20(1): 49-53. (in Chinese)
He, C., Hu, W. Elementary lecture on water lock effect and reservoir damage. Natural Gas Industry 1994, 14(6): 36-38. (in Chinese)
Jiang, G., Li, Y., Zhang, M. Evaluation of gas wettability and its effects on fluid distribution and fluid flow in porous media. Pet. Sci. 2013, 10(4): 515-527.
King, G.E. Hydraulic Fracturing 101: What every repre-sentative, environmentalist, regulator, reporter, investor, university researcher, nighbor and engineer should know about estimating frac risk. J. Pet. Technol. 2012, 64(4): 34-42.
Lin, D., Wang, J., Yuan, B., et al. Review on gas flow and recovery in unconventional porous rocks. Adv. Geo-Energy Res. 2017, 1(1): 39-53.
Liu, H., Ranjith, P., Georgi, D., et al. Some key technical issues in modelling of gas transport process in shales: A review. Geomech. Geophys. Geo-Energy Geo-Resour. 2016, 2(4): 231-243.
Liu, H., Wang, H. Ultra-low water saturation characteristics and the identification of over-pressured play fairways of marine shales in South China. Natural Gas Industry 2013, 33(7): 140-144. (in Chinese)
Meng, Q., Liu, H., Wang, J. A critical review on fundamental mechanisms of spontaneous imbibition and the impact of boundary condition, fluid viscosity and wettability. Adv. Geo-Energy Res. 2017, 1(1): 1-17.
Pang, Y., Soliman, M., Deng, H., et al. Effect of methane adsorption on stress-dependent porosity and permeability in shale gas reservoirs. Paper SPE 180260 Presented at SPE Low Perm Symposium, Denver, Colorado, USA, 5-6 May, 2016.
Pang, Y., Soliman, M., Sheng, J. Investigation of adsorption effects on nanopores in shale gas reservoir by simplified local-density model. Paper Presented at Unconventional Resources Technology Conference, San Antonio, Texas, 1-3 August, 2016.
Pang, Y., Soliman, M.Y., Deng, H., et al. Experimental and analytical investigation of adsorption effects on shale gas transport in organic nanopores. Fuel 2017, 199(1): 272-288.
Passey, Q.R., Bohacs, K., Esch, W.L., et al. From oil-prone source rock to gas-producing shale reservoir-geologic and petrophysical characterization of unconventional shale gas reservoirs. Paper SPE 131350 Presented at International Oil and Gas Conference and Exhibition in China, Beijing, 8-10 June, 2010.
Penny, G.S., Dobkins, T.A., Pursley, J.T. Field study of completion fluids to enhance gas production in the barnett shale. Paper SPE 100434 Presented at SPE Gas Technology Symposium, Canada, 15-17 May, 2006.
Qasem, F.H., Nashawi, I.S., Gharbi, R., et al. Recovery performance of partially fractured reservoirs by capillary imbibition. J. Pet. Sci. Eng. 2008, 60(1): 39-50.
Shanley, K.W., Cluff, R.M., Robinson, J.W. Factors controlling prolific gas production from low-permeability sandstone reservoirs: Implications for resource assessment, prospect development, and risk analysis. AAPG Bull. 2004, 88(8): 1083-1121.
Shen, Y., Ge, H., Li, C., et al. Water imbibition of shale and its potential influence on shale gas recoverya comparative study of marine and continental shale formations. J. Nat. Gas Sci. Eng. 2016, 35(a): 1121-1128.
Shen, Y., Ge, H., Meng, M., et al. Effect of water imbibition on shale permeability and its influence on gas production. Energy Fuels 2017, 31(5): 4973-4980.
Shen, Y., Ge, H., Su, S., et al. Impact of capillary imbibition into shale on lost gas volume. Chem. Technol. Fuels Oils 2016, 52(2): 536-541.
Shen, Y., Ge, H., Su, S., et al. Imbibition characteristic of shale gas formation and water-block removal capability. SCIENTIA SINICA Physica, Mechanica & Astronomica 2017, 47(11): 114609. (in Chinese)
Wang, Z. Breakthrough of Fuling shale gas exploration and development and its inspiration. Oil & Gas Geology 2015, 36(1): 1-6. (in Chinese)
Zhang, D., Ranjith, P., Perera, M., et al. Influence of water saturation on the mechanical behaviour of low-permeability reservoir rocks. Energies 2017, 10(2): 236.
Zhong, H. Flow of gas and water in hydraulically fractured shale gas reservoirs. Paper Presented at EPA HF Workshop, Society of Petroleum Engineers, Arlington, Virginia, 28-29 March, 2011.
Zhou, D., Jiao, F., Jia, C., et al. Large-scale multi-stage hydraulic fracturing technology for shale gas horizontal Well JY1HF. Petroleum Drilling Techniques 2014, 42(1): 75-80. (in Chinese)
Zou, C., Zhu, R., Bai, B., et al. First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value. Acta Petrologica Sinica 2011, 27(6): 1857-1864. (in Chinese)
Refbacks
- There are currently no refbacks.
Copyright (c) 2018 The Author(s)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.